J.J. Abrams' upcoming post-electronics sci-fi show Revolution comes to NBC this year, and stars Giancarlo Esposito, Tracy Spiridakos and Billy Burke sat down with John Barrowman at Comic-Con 2012 Live to discuss what it's been like to bring the vision of a world without electricity to life and to reveal huge spoilers about the show. (Yeah right. It's an Abrams joint. You better believe these scripts are under lock and key until the day they're shot. Good luck trying to figure this one out when it airs later this year.)